Perhaps you should try some spelling variations:
cua triet » cua viet, va triet
su triet » su viet, su tien, ve triet
van hanh » van thanh, ban hanh, van anh
va hanh » va thanh, va danh, ban hanh
tu sach » thu sach, su sach, te sach
sach ki » sach kinh, sach bai, sach kem
cam tuc » cam xuc, cam tu, nam thuc
hieu ve » hieu va, hieu van
ki nang » ky nang
ve cam » ve cham, ve cac, va cam
nang o » nang co, nang ho, nang ro
o hoi » co hoi, o hoc, o hai

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach ki nang o hoi. hieu ve cam tuc ((va hanh) OR (van hanh)) vai ((cua triet) or (su triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ki nang o hoi. hieu ve cam tuc ((va hanh) OR (van hanh)) vai ((cua triet) OR (su triet))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ki nang o hoi. hieu ve cam tuc ((va hanh) OR (van hanh)) vai ((cua triet) or (su triet))*".